Genera : 40 +/-

Species: 700


 Links to genus directories:


Distribution: Cosmopolitan, with the greatest diversity in the arctic, boreal and montane regions of the Northern Hemisphere.

Economic Uses: Important as cultivated garden ornamentals, especially in rock gardens or in gardens composed of native woodland plants.

Defining Features of Interest: The family is debated regarding the features delimiting it from other families. It has been widely imterpreted by various botanists.

Fossil Evidence:Questionable fossils from Eocene deposits.